I had a scary experience with my recently installed vacuum brakes. i just got done with a full boost blast 23# down a 2 lane highway (80-90 or so) and no brakes !!!! i blew through a green light thank god and finally got it stopped . opened the hood and at the vacuum filter the hose blew off. being under boost the manifold is pressurized 23# and the check valve is on the booster, so from the T to the booster its under pressure without hose clamps. I installed hose clamps at every connection. Im also thinking of also installing a one way vacuum valve at the vacuum source, a little extra insurance....Has anybody else had this happen??